title: Urinary screening for methylphenidate (Ritalin) abuse: a comparison of liquid chromatography-tandem mass spectrometry, gas chromatography-mass spectrometry, and immunoassay methods.
mesh_terms: D002853:Chromatography, Liquid / Q000191:economics / Q000379:methods*; D004797:Enzyme-Linked Immunosorbent Assay / Q000191:economics / Q000379:methods*; D008401:Gas Chromatography-Mass Spectrometry / Q000191:economics / Q000379:methods*; D006801:Humans; D008774:Methylphenidate / Q000737:chemistry / Q000652:urine*; D015813:Substance Abuse Detection / Q000191:economics / Q000379:methods*; D019966:Substance-Related Disorders / Q000652:urine*
chemical_list: D008774:Methylphenidate